Telegraph system.



A. F; 'mzum.

.IELEGRAPH SYSTEMr APPLICATION FILED APR. l5. IBIS.

1,2315140. Patented June 20, 1917.

Lincsignala. n @C Q m; I LZIJL 113w I W/YneJseai v kzvn/on UNITED STATES I PATENT OFFICE;

AMOS F. DIXON, OF NEWARK, NEW JERSEY. ASSIGNOR. BY MESNE ASSIGNMENTS, TO WESTERN ELECTRIC COMPANY, INCORPORATED, .A CORPORATION OF NEW YORK.

TELEGRAIPH SYSTEM.

Specification of Letters Patent.

To all whom it may concern.

lle it known that I, Amos F; Dixon, :1-

:citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Telegraph Systems, of which the following is a 'full, clear, concise, and exact description.

This invention relates to telegraph sys tems, more particularly to multiplex printing telegraphs, and. its principal object is to provide for automatically signaling the receipt of operative current impulses at any printer. I

In ordinary telegraphs a galvanorneter or other indicating instrument in the line circuitwill give a suflicient notification of the receipt of current impulses but in multiplex operation, such an indication is not suflicient. The attendant must be able to determine which printer is at fault. WVithout some such arrangement an attendant cannot.

know'whether the inactionbf a particular printer is: due to the non'recei'pt of operative current impulses or to the failure of the appa-ratus to properly respond to impulses. By the use of this invention, how over, such cuncertaintyfl is obviated and an attendant is notified immediately upon the failure of a-printer to respond.

To the above end the invention contemplates an indicating or signaling device associated with each printer and responsive only to impulses operative upon such printer, A signal lamp cooperating with additional segments associated with the receiving segments on the distribi'iters and controlled from the same source as the selecting electromechanisms is believed to be the preferable, although obviously not/the only embodiment The above and other objects of this invention will be fully set forth in the following description and claims and will be more readily understood by refenence to the ac companying drawing, whirein Figure 1 shows the preferred embodiment diagrammatically andFig. 2 is a partial development of the receiving current distrihuter.

At the transmitting station there is the usual distributer 5 associated with suitable transmitting or current controlling devices for supplying the desired current impulses sequentially to atransmission line L to as feet the printing apparatus at the receiving station A. These impulses traverse a polarized relay 10, which maybe. of the usual Well l-"r'nown construction. 5. pivoted armature 1 1 cooperating with suitable contacts, one of which is connected to a grounded source of energy 12. Armature 11 is connected to a common receiving ring 15 of a receiving current distributor 16. This distributor is made up of several groups of receiving segments 21, 22523, 24

and 25 (in the drawing four such groups being shown) insulated from. each. other and It is provided with Patented June 26, 1917.

adapted to be successively brou ht into electrical connection with ring 15 y a pair of brushes 30, which are rotatable in the direction of the arrow, in synchronism' with the received impulses, by a suitable arm 31. Each of the receiving segments 21 to 25 inelusive may be associated with any desired and appropriate form of selecting apparatns; as, for example, the multiplex gprinting telegraph receiver disclosed iii-Patent No. 1103,133 patented July 14, 1914.

' Located between pairs of adjacent receivsegments of a group and insulatedtherefrom are signal segments 35.

These segments are also adapted to he successively connected to ring 15 by brushes 30 and those associated with a given of receiving segments are connected together and to a signal lamp 36. This lamp is prefi erably located near its associated printer.

Now when the operative impulses in line :L cause polarized relay 10 to connect source each change in the line current which resuits in armature 11 connecting source 12 to ring 15 a circuit will also be formed through the signal segment 35 upon which the outer brush 30 happens to be at thatmoment to signal lamp 36, causing the lamp to glow.

The attendant is thereby notified that operaassociated therewith should be functioning.

If, however, the printers are not operating during the flashing of the signal lamps, it

at once evident that thereis some trouble in the system between the. receiving segments and the apparatus for performing the desiredop'eration. It wil. beapparent from the above descri )tion and a study of Fig. 2 that, evemthougi arm 31 is not rotating so that the current reversals take place when outer brush is at the mid poi; r, of a signal segment 35, a circui't may'still be established between signal 36 and source 12 which should be sufficient to (:nusethe lamp to glow. ThcImore beyond the mid point the outer brush 30 is-at the time of a reversal to an operative impulse, the"shorter will be the period of How of current from source 12 if the preceding impulse was in operative While if the reversal takes place before the mid point is .rez'iched the How of current under such a condition will be for a longer period.

What is claimed is:

I. In a telegraph system, the combination of a current distributer having receiving segments divided into groups, signal segments positioned between said receiving segments, and a signal (:06 crating with the signal segments associate ceiving segments. v

In a telegraph system, the combination of a current distributer having receiving with a group of resegments divided into groups, signal segf ments associated with each of said-groups, means controlled ,by line impulses for supplying current to said segments, and a-plurality of signals, one associated with the signal segments of each group and operable by the current thus supplied thereto.

in a telegraph system, the combination of a purrent distributer having receiving segments, signal se ents associated therewith, and a signa ingdevice cooperating with said signal segments and responsivevto reversals of line current.

In witness whereof, I hereunto subscribe my name this 14th day of April A. 1)., 1915. AMOS F. DIXON. V 

